Example usage for java.security MessageDigest update

Introduction

In this page you can find the example usage for java.security MessageDigest update.

Prototype

public void update(byte[] input, int offset, int len) 

Source Link

Document

Updates the digest using the specified array of bytes, starting at the specified offset.

Usage

From source file:data.repository.pragma.utils.MD5Utils.java

public static String getDigest(InputStream is, MessageDigest md, int byteArraySize) {

    md.reset();//from w  w w . j  av a  2  s . c  om
    byte[] bytes = new byte[byteArraySize];
    int numBytes;
    try {
        while ((numBytes = is.read(bytes)) != -1) {
            md.update(bytes, 0, numBytes);
        }
        byte[] digest = md.digest();
        String result = new String(Hex.encodeHex(digest));
        return result;
    } catch (IOException e) {
        // TODO Auto-generated catch block
        return null;
    }
}

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From source file:Main.java

public static String checkSum(String path) {
    String checksum = null;// w  w  w .j  a v  a 2  s  . c  o m
    try {
        FileInputStream fis = new FileInputStream(path);
        MessageDigest md = MessageDigest.getInstance("MD5");

        //Using MessageDigest update() method to provide input
        byte[] buffer = new byte[8192];
        int numOfBytesRead;
        while ((numOfBytesRead = fis.read(buffer)) > 0) {
            md.update(buffer, 0, numOfBytesRead);
        }
        byte[] hash = md.digest();
        checksum = new BigInteger(1, hash).toString(16); //don't use this, truncates leading zero
    } catch (IOException | NoSuchAlgorithmException ignored) {
    }
    assert checksum != null;
    return checksum.trim();
}

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From source file:mx.com.pendulum.carga.util.Md5Converter.java

public static String calculaMD5(byte[] data) {
    InputStream is = new ByteArrayInputStream(data);
    try {//from w  w  w  .  j a v  a  2  s .co m
        byte[] buffer = new byte[1024];
        MessageDigest digest = MessageDigest.getInstance("MD5");
        int numRead = 0;
        while (numRead != -1) {
            numRead = is.read(buffer);
            if (numRead > 0) {
                digest.update(buffer, 0, numRead);
            }
        }
        byte[] md5Bytes = digest.digest();
        return convertHashToString(md5Bytes);
    } catch (Exception e) {
        return null;
    } finally {
        if (is != null) {
            try {
                is.close();
            } catch (Exception e) {
            }
        }
    }

}

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From source file:mx.com.pendulum.carga.util.Md5Converter.java

public static String getMD5Checksum(MultipartFile multipartFile) {
    InputStream is = null;//  ww  w. j  a  v  a 2 s . c  o  m
    try {
        is = new ByteArrayInputStream(multipartFile.getBytes());
        byte[] buffer = new byte[1024];
        MessageDigest digest = MessageDigest.getInstance("MD5");
        int numRead = 0;
        while (numRead != -1) {
            numRead = is.read(buffer);
            if (numRead > 0) {
                digest.update(buffer, 0, numRead);
            }
        }
        byte[] md5Bytes = digest.digest();
        return convertHashToString(md5Bytes);
    } catch (Exception e) {
        return null;
    } finally {
        if (is != null) {
            try {
                is.close();
            } catch (Exception e) {
            }
        }
    }
}

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From source file:com.antelink.sourcesquare.client.scan.FileAnalyzer.java

/**
 * Computes the hash of a given file.//  ww  w . j a v a2s .com
 * 
 * @param hashType
 *            Hash that you want to compute. Usually SHA-1 or MD5 (or any
 *            other kind supported by java.security.MessageDigest).
 * @param fileToAnalyze
 *            Descriptor of the file to analyze. Must be a file otherwise
 *            you will get an exception.
 * @return the String hexadecimal representation of the file hash.
 * @throws NoSuchAlgorithmException
 *             if hashType is not a supported hash algorithm
 * @throws IOException
 *             in case of an I/O error while reading file
 */
public static String calculateHash(String hashType, File fileToAnalyze)
        throws NoSuchAlgorithmException, IOException {
    FileInputStream fis = null;
    BufferedInputStream inputStream = null;
    try {
        logger.debug("Calculating sha1 for file " + fileToAnalyze.getName());
        fis = new FileInputStream(fileToAnalyze);
        inputStream = new BufferedInputStream(fis);
        MessageDigest digest = MessageDigest.getInstance(hashType);
        byte[] buffer = new byte[1024 * 1024];
        int length = -1;
        while ((length = inputStream.read(buffer)) != -1) {
            digest.update(buffer, 0, length);
        }

        String hash = new String(Hex.encodeHex(digest.digest()));
        logger.debug("Sha1 calculated for file " + fileToAnalyze.getName());
        return hash;
    } finally {
        IOUtils.closeQuietly(inputStream);
        IOUtils.closeQuietly(fis);
    }
}

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From source file:com.googlecode.download.maven.plugin.internal.SignatureUtils.java

static String computeSignatureAsString(File file, MessageDigest digest) throws IOException {
    InputStream fis = new FileInputStream(file);
    byte[] buffer = new byte[1024];
    int numRead;// ww  w. j  a  v a2  s.  c om
    do {
        numRead = fis.read(buffer);
        if (numRead > 0) {
            digest.update(buffer, 0, numRead);
        }
    } while (numRead != -1);
    fis.close();
    byte[] actualDigest = digest.digest();
    return new String(Hex.encodeHex(actualDigest));
}

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From source file:Main.java

public static final String getOblyDevicesID(Context mContext) {

    String m_szImei = "";
    try {/*from  w  w w .j a  v a  2  s .  c  om*/
        TelephonyManager TelephonyMgr = null;
        TelephonyMgr = (TelephonyManager) mContext.getSystemService(Activity.TELEPHONY_SERVICE);
        m_szImei = TelephonyMgr.getDeviceId();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    String m_szDevIDShort = null;
    try {
        m_szDevIDShort = "35" + //we make this look like a valid IMEI

                Build.BOARD.length() % 10 + Build.BRAND.length() % 10 + Build.CPU_ABI.length() % 10
                + Build.DEVICE.length() % 10 + Build.DISPLAY.length() % 10 + Build.HOST.length() % 10
                + Build.ID.length() % 10 + Build.MANUFACTURER.length() % 10 + Build.MODEL.length() % 10
                + Build.PRODUCT.length() % 10 + Build.TAGS.length() % 10 + Build.TYPE.length() % 10
                + Build.USER.length() % 10; //13 digits
    } catch (Exception ex) {
        ex.printStackTrace();
    }

    String m_szAndroidID = "";
    try {
        m_szAndroidID = "";
        Settings.Secure.getString(mContext.getContentResolver(), Settings.Secure.ANDROID_ID);
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    String m_szWLANMAC = "";
    try {
        WifiManager wm = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
        m_szWLANMAC = wm.getConnectionInfo().getMacAddress();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    String m_szBTMAC = null;
    try {
        BluetoothAdapter m_BluetoothAdapter = null; // Local Bluetooth adapter
        m_BluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        m_szBTMAC = m_BluetoothAdapter.getAddress();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    String m_szLongID = m_szImei + m_szDevIDShort + m_szAndroidID + m_szWLANMAC + m_szBTMAC;
    // compute md5
    MessageDigest m = null;
    try {
        m = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    m.update(m_szLongID.getBytes(), 0, m_szLongID.length());
    // get md5 bytes
    byte p_md5Data[] = m.digest();
    // create a hex string
    String m_szUniqueID = new String();
    for (int i = 0; i < p_md5Data.length; i++) {
        int b = (0xFF & p_md5Data[i]);
        // if it is a single digit, make sure it have 0 in front (proper padding)
        if (b <= 0xF)
            m_szUniqueID += "0";
        // add number to string
        m_szUniqueID += Integer.toHexString(b);
    } // hex string to uppercase
    m_szUniqueID = m_szUniqueID.toUpperCase();

    return m_szUniqueID;
}

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From source file:it.feio.android.omninotes.utils.ACRAPostSender.java

public static String md5(String s) {
    MessageDigest m = null;
    try {//from  w  ww  .j  a  v a  2  s  .  c o  m
        m = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    m.update(s.getBytes(), 0, s.length());
    String hash = new BigInteger(1, m.digest()).toString(16);
    return hash;
}

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From source file:Main.java

public static String getMD5EncryptedString(String encTarget) {
    MessageDigest mdEnc = null;
    try {//from w w  w.ja  v  a  2s . c o m
        mdEnc = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        System.out.println("Exception while encrypting to md5");
        e.printStackTrace();
    } // Encryption algorithm
    mdEnc.update(encTarget.getBytes(), 0, encTarget.length());
    String md5 = new BigInteger(1, mdEnc.digest()).toString(16);
    while (md5.length() < 32) {
        md5 = "0" + md5;
    }
    return md5;
}

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From source file:com.netflix.raigad.utils.SystemUtils.java

public static byte[] md5(byte[] buf) {
    try {//  w  w  w . j  a v  a2s.c o m
        MessageDigest mdigest = MessageDigest.getInstance("MD5");
        mdigest.update(buf, 0, buf.length);
        return mdigest.digest();
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

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